#include<iostream>
#include<string> 
#include<cstdlib>
using namespace std;
const int NUM=4;
struct Student{
	unsigned ID;
	string name;
	float fGPA;
};
Student Myclass[NUM]={
	{1234,"Tom",3.78},
	{1238,"Jack",3.25},
	{1232,"Mary",4.00},
	{1237,"Jone",2.78}	
};
int CompareID(const void *elem1,const void *elem2)
